rancher: Rancher 2.4.2 - Windows Cluster using flannel host-gw not working

What kind of request is this (question/bug/enhancement/feature request): Bug

Steps to reproduce (least amount of steps as possible):

1. Create a Windows Cluster using flannel / host-gw

Result: The pod cattle-node-agent-windows continuously crashes:

WARN: Default docker named pipe is not found
WARN: Please bind mount in the docker named pipe to //./pipe/docker_engine if docker errors occur
WARN: example: docker run -v //./pipe/custom_docker_named_pipe://./pipe/docker_engine ...
FATA: https://rancher.xxx.com is not accessible

Other details that may be helpful: exec’ing into the pod prior to it crashing and trying to use curl results in timeouts for all addresses. curl from the kubelet and/or other pods works fine.

Setting up a cluster using flannel / vxlan works perfectly fine.

Environment information

• Rancher version (rancher/rancher/rancher/server image tag or shown bottom left in the UI): 2.4.2
• Installation option (single install/HA): HA

Cluster information

• Cluster type (Hosted/Infrastructure Provider/Custom/Imported): Custom
• Machine type (cloud/VM/metal) and specifications (CPU/memory): Bare metal, 2 CPU cores, 8 GB RAM
• Kubernetes version (use kubectl version):

(Switched to 1.15.11 to see if it'll work on that version. Have also tried 1.16.9)

lient Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.1", GitCommit:"4485c6f18cee9a5d3c3b4e523bd27972b1b53892", GitTreeState:"clean", BuildDate:"2019-07-18T09:18:22Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"windows/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.11", GitCommit:"d94a81c724ea8e1ccc9002d89b7fe81d58f89ede", GitTreeState:"clean", BuildDate:"2020-03-12T21:00:06Z", GoVersion:"go1.12.17", Compiler:"gc", Platform:"linux/amd64"}

• Docker version (use docker version):

(This is on the windows node)

Client: Docker Engine - Enterprise
 Version:           19.03.5
 API version:       1.40
 Go version:        go1.12.12
 Git commit:        2ee0c57608
 Built:             11/13/2019 08:00:16
 OS/Arch:           windows/amd64
 Experimental:      false

Server: Docker Engine - Enterprise
 Engine:
  Version:          19.03.5
  API version:      1.40 (minimum version 1.24)
  Go version:       go1.12.12
  Git commit:       2ee0c57608
  Built:            11/13/2019 07:58:51
  OS/Arch:          windows/amd64
  Experimental:     false